Failure and maintenance of spark plug

(1) normal

Normal refers to the air-fuel ratio, ignition advance Angle right right, spark plugs, calorific value, combustion chamber combustion is normal, right or no hot fire, no leakage fire.Under normal circumstances, the spark plug almost no carbon deposit, drying, basic no ablation electrode, a shallow brown (rust) or surface with a light gray powder.As long as wiping off slightly sedimentary residue when maintenance, but continue to use.

(2) carbon deposit defiled

Spark plug formation is dry, with matte black carbon layer deposition.Serious when carbon layer is hairy.Carbon deposition can lead to leakage fire.Combustible gas too thick, high calorific value, ignition weak or spark plug electrode gap too metropolitan lead to carbon deposit.After the removal of carbon layer can still use spark plug.

(3) use overheat

Skirt dry white or light gray, serious when have partial loose porcelain tube surface uplift.Proximal electrode ablation obviously, the center electrode and a ring ablation, and nodular particles adhesion.Combustible gas too thin, low calorific value of spark plug or a flat, ignition premature or gasoline engine overheating, burning can cause overheating, to update as well.

(4) the oil stained

Oil, light there, be bored with wet.Too much oil in the mixed oil, crankshaft oil seal leakage, low calorific value of spark plug, idle time is too long, or a low speed can cause oil soiled.No special cleaning fluid are harder to remove.The spark plug electrode gap is an important technical data, should according to the instruction value adjustment.No electric shock ignition generally 0.6 0.7 mm.Clearance is too large, high speed of engine performance is bad;Is too small, low speed performance is bad.

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